Results 11 to 20 of about 26,451 (248)
Simulating Reionization: Character and Observability [PDF]
AIP Conference Proceedings, 2007 In recent years there has been considerable progress in our understanding of the nature and properties of the reionization process. In particular, the numerical simulations of this epoch have made a qualitative leap forward, reaching sufficiently large ...
Bond, J. Richard +5 more
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Cosmic Reionization in the JWST Era: Back to AGNs? [PDF]
The Astrophysical JournalDeep surveys with the James Webb Space Telescope (JWST) have revealed an emergent population of moderate-luminosity, broad-line active galactic nuclei (AGNs) at 4 ≲ z ≲ 13 powered by accretion onto early massive black holes.
Piero Madau +3 more
doaj +2 more sources
The First Galaxies and the Likely Discovery of Their Fossils in the Local Group [PDF]
Advances in Astronomy, 2010 The lower bound for the mass of a galaxy is unknown, as are the typical luminosity of the smallest galaxies and their numbers. The answers depend on the extent to which star formation in the first population of small mass halos may be suppressed by ...
Massimo Ricotti
doaj +4 more sources
Living Reviews in Computational Astrophysics, 2022 AbstractThe transformation of cold neutral intergalactic hydrogen into a highly ionized warm plasma marks the end of the cosmic dark ages and the beginning of the age of galaxies. The details of this process reflect the nature of the early sources of radiation and heat, the statistical characteristics of the large-scale structure of the Universe, the ...
Nickolay Y. Gnedin, Piero Madau
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CEMPlifying reionization [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 The massive stars that ionised the Universe have short lifetimes and can only be studied near the time of formation, but any low mass stars that formed contemporaneously might be observable in the local Universe today. We study the abundance pattern and spatial distribution of these `siblings of reionizers' (SoRs) in the EAGLE cosmological ...
Mahavir Sharma, Tom Theuns, Carlos Frenk
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The Impact of Patchy Reionization on Ultrafaint Dwarf Galaxies
The Astrophysical Journal, 2023 We investigate how patchy reionization affects the star formation history (SFH) and stellar metallicity of ultrafaint dwarf galaxies (UFDs). Patchy reionization refers to varying ultraviolet background strengths depending on a galaxy’s environment ...
Jaeeun Kim +5 more
doaj +1 more source
The Epoch of Reionization in Warm Dark Matter Scenarios
Universe, 2021 In this paper we investigate how the Reionization process is affected by early galaxy formation in different cosmological scenarios. We use a semi-analytic model with suppressed initial power spectra to obtain the UV Luminosity Function in thermal Warm ...
Massimiliano Romanello +2 more
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The epoch of reionization [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 We have modelled the process of reionization of the IGM by photoionization by galaxies, in order to predict the epoch of reionization. We use a sophisticated semi-analytic model to track the formation of galaxies. Our study represents a much more complete and physically consistent modelling of reionization than has been conducted in the past ...
Benson, A.J. +3 more
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Dust distribution during reionization [PDF]
Astronomy & Astrophysics, 2007 The dust produced by the first generation of stars will be a foreground to cosmic microwave background. In order to evaluate the effect of this early dust, we calculate the power spectrum of the dust emission anisotropies and compare it with the sensitivity limit of the Planck satellite.
Elfgren, E. +2 more
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The reionization of carbon [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 Observations suggest that CII was more abundant than CIV in the intergalactic medium towards the end of the hydrogen reionization epoch. This transition provides a unique opportunity to study the enrichment history of intergalactic gas and the growth of the ionizing background (UVB) at early times.
Finlator, Kristian +5 more
openaire +3 more sources